Trophic versus geographic structure in stable isotope signatures of pelagic seabirds breeding in the northeast Atlantic
13 páginas, 2 figuras, 4 tablas.
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| Format: | artículo biblioteca |
| Language: | English |
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Inter Research
2011
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| Subjects: | Feeding ecology, Marine isoscapes, Migratory movements, Procellariiformes, Trophic niche, |
| Online Access: | http://hdl.handle.net/10261/43567 |
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dig-ibe-es-10261-435672021-04-16T11:16:47Z Trophic versus geographic structure in stable isotope signatures of pelagic seabirds breeding in the northeast Atlantic Roscales, José L. Gómez-Díaz, Elena Neves, Verónica González-Solís, Jacob Feeding ecology Marine isoscapes Migratory movements Procellariiformes Trophic niche 13 páginas, 2 figuras, 4 tablas. Feeding ecology and geographic location are 2 major factors influencing animal stable isotope signatures, but their relative contributions are poorly understood, which limits the usefulness of stable isotope analysis in the study of animal ecology. To improve our knowledge of the main sources of isotopic variability at sea, we determined δ15N and δ13C signatures in the first primary feather of adult birds from 11 Procellariiform species (n = 609) across 16 northeast Atlantic localities, from Cape Verde (20°N) to Iceland (60°N). Post-breeding areas (where the studied feather is thought to be grown) were determined using light-level geolocation for 6 of the 11 species. Isotopic variability was geographically unstructured within the mid-northeast Atlantic (Macaronesian archipelagos), but trophically structured according to species and regardless of the breeding location, presumably as a result of trophic segregation among species. Indeed, the interspecific isotopic overlap resulting from combining δ15N and δ13C signatures of seabirds was low, which suggests that most species exploited exclusive trophic resources consistently across their geographic range. Species breeding in north temperate regions (Iceland, Scotland and Northern Ireland) showed enriched N compared to the same or similar species breeding in tropical and subtropical regions, suggesting some differences in baseline levels between these regions. The present study illustrates a noticeable trophic segregation of northeast Atlantic Procellariiformes. Our results show that the isotopic approach has limited applicability for the study of animal movements in the northeast Atlantic at a regional scale, but is potentially useful for the study of long-distance migrations between large marine systems. J.L.R. and E.G.-D. were supported by a postgraduate grant from the Generalitat de Catalunya, V.N. by a postgraduate grant of the Portuguese Fundaçáo para a Ciênciaea Tecno - logia/ Foundation for Science and Technology and J.G.-S. by the Ramon y Cajal programme. This work benefited from support by the Ministerio de Ciencia e Innovación (CGL2009-11278/BOS) and Fondos Feder. Peer reviewed 2011-12-21T09:10:09Z 2011-12-21T09:10:09Z 2011 artículo http://purl.org/coar/resource_type/c_6501 Marine Ecology Progress Series 434: 1-13 (2011) 0171-8630 http://hdl.handle.net/10261/43567 10.3354/meps09211 1616-1599 en http://dx.doi.org/10.3354/meps09211 open Inter Research |
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| language |
English |
| topic |
Feeding ecology Marine isoscapes Migratory movements Procellariiformes Trophic niche Feeding ecology Marine isoscapes Migratory movements Procellariiformes Trophic niche |
| spellingShingle |
Feeding ecology Marine isoscapes Migratory movements Procellariiformes Trophic niche Feeding ecology Marine isoscapes Migratory movements Procellariiformes Trophic niche Roscales, José L. Gómez-Díaz, Elena Neves, Verónica González-Solís, Jacob Trophic versus geographic structure in stable isotope signatures of pelagic seabirds breeding in the northeast Atlantic |
| description |
13 páginas, 2 figuras, 4 tablas. |
| format |
artículo |
| topic_facet |
Feeding ecology Marine isoscapes Migratory movements Procellariiformes Trophic niche |
| author |
Roscales, José L. Gómez-Díaz, Elena Neves, Verónica González-Solís, Jacob |
| author_facet |
Roscales, José L. Gómez-Díaz, Elena Neves, Verónica González-Solís, Jacob |
| author_sort |
Roscales, José L. |
| title |
Trophic versus geographic structure in stable isotope signatures of pelagic seabirds breeding in the northeast Atlantic |
| title_short |
Trophic versus geographic structure in stable isotope signatures of pelagic seabirds breeding in the northeast Atlantic |
| title_full |
Trophic versus geographic structure in stable isotope signatures of pelagic seabirds breeding in the northeast Atlantic |
| title_fullStr |
Trophic versus geographic structure in stable isotope signatures of pelagic seabirds breeding in the northeast Atlantic |
| title_full_unstemmed |
Trophic versus geographic structure in stable isotope signatures of pelagic seabirds breeding in the northeast Atlantic |
| title_sort |
trophic versus geographic structure in stable isotope signatures of pelagic seabirds breeding in the northeast atlantic |
| publisher |
Inter Research |
| publishDate |
2011 |
| url |
http://hdl.handle.net/10261/43567 |
| work_keys_str_mv |
AT roscalesjosel trophicversusgeographicstructureinstableisotopesignaturesofpelagicseabirdsbreedinginthenortheastatlantic AT gomezdiazelena trophicversusgeographicstructureinstableisotopesignaturesofpelagicseabirdsbreedinginthenortheastatlantic AT nevesveronica trophicversusgeographicstructureinstableisotopesignaturesofpelagicseabirdsbreedinginthenortheastatlantic AT gonzalezsolisjacob trophicversusgeographicstructureinstableisotopesignaturesofpelagicseabirdsbreedinginthenortheastatlantic |
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